Pyrido[3,4-d]pyrimidine-7(6H)-carboxylic acid, 4-[(3S)-3-(cyanomethyl)-4-[(1,1-dimethylethoxy)carbonyl]-1-piperazinyl]-5,8-dihydro-2-(methylsulfinyl)-, phenylmethyl ester
Pyrido[3,4-d]pyrimidine-7(6H)-carboxylic acid, 4-[(3S)-3-(cyanomethyl)-4-[(1,1-dimethylethoxy)carbonyl]-1-piperazinyl]-5,8-dihydro-2-(methylsulfinyl)-, phenylmethyl ester